For racers who want adjustments at their fingertips, the MSD 7AL-3 packs high voltage output with four-step retards, three rev limits, and an RPM-activated switch, all set with plug-in modules. The 3-Step Rev Control lets a racer set one limit for the burnout, another for staging, and a third for top-end engine protection, while four independent nitrous retard stages can be activated separately or stacked together. The start retard is also adjustable via plug-in modules for better control during cranking.
Specifications:
- Product Type: Ignition Box
- Color: Black
- Primary Voltage: 570V / Secondary Voltage: 50,000V
- Spark Energy: 160 mJ per spark
- Maximum RPM: 14,000 RPM (at 14.4V)
- Current Draw: 6 Amps at 6,000 RPM / 12 Amps at 12,000 RPM
- Voltage Required: 12-18V, Negative Ground
- Rev Limiter: 3-Step
- Retard: 4-Stage Multi-Step, plus Adjustable Start Retard
- Weight & Size: 4.85 lbs., 8.25"L x 3.75"W x 5.75"H
- Part Number: 7330
Cylinder select works on 4, 6, or 8-cylinder engines; includes a diagnostic trigger LED and an RPM Activated Switch for precise circuit control.
Compliance: This part is legal for sale and use on Racing Use Only Vehicles — competition vehicles that are not registered and never operated on the street. It is against the law to install this part on an Emissions Controlled Vehicle (1966-and-newer California-certified or 1968-and-newer federally certified vehicles).
FAQ
Is the 7AL-3 street legal?
No. It carries Emission Code 4, meaning it's legal for sale and use only on Racing Use Only vehicles — competition cars that are never registered or driven on the street.
How many rev limits does the 7AL-3 offer?
Three — one for burnout, one for staging RPM, and one for top-end engine protection — all set with plug-in modules.
How many nitrous retard stages does it support?
Four independent stages that can be activated separately or stacked together for a combined retard.
What is the RPM Activated Switch used for?
It provides a switched output that activates at a set RPM, giving precise control over an external circuit such as a nitrous stage or shift light.
